Bleaching and dyeing; fluid treatment and chemical modification – Dye concentrate composition wherein an additional amount of...
Patent
1981-01-19
1982-06-22
Clingman, A. Lionel
Bleaching and dyeing; fluid treatment and chemical modification
Dye concentrate composition wherein an additional amount of...
8585, 8604, 8609, 8681, 8687, 8918, 8919, 8924, D06P 6700
Patent
active
043360262
ABSTRACT:
A liquid preparation of an anionic dye of the disazo class, which preparation contains the disazo dye, which in the form of the free acid corresponds to the formula ##STR1## dissolved in a solvent mixture which is miscible with water in any proportion and which consists of N,N,N',N'-tetramethylurea, at least one alkylene glycol ether and water, and alkyl- or alkanolamine in an amount sufficient to bring the pH value of the liquid preparation to 6.5 to 8.5, the dye being in the form of alkyl- or alkanolamine. This novel liquid preparation is a concentrated true solution which is stable in storage over several months at temperatures of between about -10.degree. C. and +60.degree. C., and which is miscible with cold and warm water in any proportion. It is suitable in particular for dyeing and printing paper, including semi-cardboard and cardboard, the dyeing of these materials being possible, for example, in the pulp, or by brushing or immersion.
REFERENCES:
patent: 4163012 (1979-07-01), Kramer et al.
patent: 4179267 (1979-12-01), Lacroix et al.
Ciba-Geigy Corporation
Clingman A. Lionel
McC. Roberts Edward
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